<template>
  <div>
    <nav-bar>
      <div slot="left" class="back" @click="backClick">
        <img src="~assets/image/common/back.svg" alt="">
      </div>
      <div slot="center" class="title">
        <div v-for="(item,index) in titles" :key="index" class="title-item"
             @click="titleClick(index)"
             :class="{active: index === currentIndex}">
          {{item}}
        </div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
  import NavBar from "../../../components/common/navbar/NavBar";
  export default {
    name: "DetailNavBar",
    components: {
      NavBar
    },
    data() {
      return {
        titles: ['商品','参数','评论','推荐'],
        currentIndex: 0
      }
    },
    methods: {
      backClick() {
        this.$router.go(-1)       /*返回上个页面*/
      },
      titleClick(index) {
        this.currentIndex = index
        this.$emit('titleClick',index)
      }
    }
  }
</script>

<style scoped>
  .back img {
    margin-top: 10px;
  }
 .title {
   display: flex;
   font-size: 13px;
 }
  .title-item {
    flex: 1;
  }
  .active {
    color: var(--color-high-text);
  }
</style>
